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scoundrel [369]
3 years ago
10

1. 3x + y = 11 5x - y = 21

Mathematics
1 answer:
sergeinik [125]3 years ago
4 0

Answer:

[4, -1]

Step-by-step explanation:

Using the Elimination Method:

3x + y = 11

5x - y = 21

__________

8x = 32

__ ___

8 8

x = 4 [Plug this back into both equations to get the y-coordinate of -1]; -1 = y

The <em>y</em>'s are already <em>additive</em><em> </em><em>inverses</em><em> </em>[result in 0], canceling each other out.

I am joyous to assist you anytime.

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Horatio is solving the equation -3/4+2/5x=7/20x-1/2. Which equations represent possible ways to begin solving for x? Check all t
trapecia [35]

Answer:

  • 2/5x=7/20x+1/4
  • -3/4=-1/20x-1/2
  • -3/4+1/20x=-1/2

Step-by-step explanation:

If you add 3/4 to both sides of the equation, you get ...

... 2/5x = 7/20x + 1/4 . . . . first choice

If you subtract 2/5x from both sides of the equation, you get ...

... -3/4 = -1/20x -1/2 . . . . third choice

If you subtract 7/20x from both sides of the equation, you get ...

... -3/4 +1/20x = -1/2 . . . . last choice

Choices 2 and 4 are erroneous versions of choices 1 and 3, so do not apply.

4 0
3 years ago
Read 2 more answers
Harold wants to put decorative tape around the side of a cube box with a volume of V.which expression gives the length of the ta
alexandr1967 [171]

Answer:

Length of the tape = Length of the side of the Cube = ³√ V

Step-by-step explanation:

The Volume of a cube box = s³

Where s = length of the side of a cube.

The units of a cube is given as cubic units.

From the question, we were told, a decorative tape was placed at the side of the cube.

Since the volume of a cube is designated as V,

The length of the tape is equivalent to the side of a cube.

Therefore, Since V = s³

Length of the tape = Length of the side of the cube is derived as :

V = s³

Find the cubic root of both side

³√ V = ³√ s³

s = ³√V

Therefore the Length of the tape = Cubic root of the Volume of the cube and it is expressed mathematically as :

s = ³√V

8 0
3 years ago
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HelpI've been trying forever to answer this​
Fed [463]

Answer:  

D

Step-by-step explanation:

go to desmos graphing calculator and insert the point and equation and you will see

Download pdf
3 0
4 years ago
Find the exact solution of x
Gennadij [26K]
x^2=16 \\ x = б \sqrt{16} \\x=б4
4 0
4 years ago
-4a5 <img src="https://tex.z-dn.net/?f=-4a%5E%7B5%7D%286a%5E%7B5%7D%29" id="TexFormula1" title="-4a^{5}(6a^{5})" alt="-4a^{5}(6a
Nikolay [14]

Answer:

-24a^10

Step-by-step explanation:

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If you would like more help in math or other subjects for FREE, check out growthinyouth.org.

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